From: Arnd Bergmann <arnd@arndb.de>

The lib80211 code uses arc4 crypto helpers that can be
disabled:

ERROR: modpost: "arc4_setkey" [drivers/net/wireless/intel/ipw2x00/libipw.ko] undefined!
ERROR: modpost: "arc4_crypt" [drivers/net/wireless/intel/ipw2x00/libipw.ko] undefined!

Select the library from Kconfig to ensure this can be called.

Fixes: 02f220b52670 ("wifi: ipw2x00/lib80211: move remaining lib80211 into libipw")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/wireless/intel/ipw2x00/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/intel/ipw2x00/Kconfig b/drivers/net/wireless/intel/ipw2x00/Kconfig
index 5e98be664d38..98a17c941100 100644
--- a/drivers/net/wireless/intel/ipw2x00/Kconfig
+++ b/drivers/net/wireless/intel/ipw2x00/Kconfig
@@ -6,6 +6,7 @@
 config IPW2100
 	tristate "Intel PRO/Wireless 2100 Network Connection"
 	depends on PCI && CFG80211
+	select CRYPTO_LIB_ARC4
 	select WIRELESS_EXT
 	select WEXT_PRIV
 	select FW_LOADER
-- 
2.39.5

On Tue, 2024-10-15 at 07:32 +0000, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The lib80211 code uses arc4 crypto helpers that can be
> disabled:
> 
> ERROR: modpost: "arc4_setkey" [drivers/net/wireless/intel/ipw2x00/libipw.ko] undefined!
> ERROR: modpost: "arc4_crypt" [drivers/net/wireless/intel/ipw2x00/libipw.ko] undefined!
> 
> Select the library from Kconfig to ensure this can be called.
> 
> Fixes: 02f220b52670 ("wifi: ipw2x00/lib80211: move remaining lib80211 into libipw")

Right, sorry. I sent a similar one before:

https://lore.kernel.org/linux-wireless/20241011115820.070c468b271d.Iac76e81b5cd9a5b949b8c154381128e8131d581d@changeid/

> +++ b/drivers/net/wireless/intel/ipw2x00/Kconfig
> @@ -6,6 +6,7 @@
>  config IPW2100
>  	tristate "Intel PRO/Wireless 2100 Network Connection"
>  	depends on PCI && CFG80211
> +	select CRYPTO_LIB_ARC4
> 
I think this got to the wrong place?

johannes